| /** | |
|  * Copies the values of `source` to `array`. | |
|  * | |
|  * @private | |
|  * @param {Array} source The array to copy values from. | |
|  * @param {Array} [array=[]] The array to copy values to. | |
|  * @returns {Array} Returns `array`. | |
|  */ | |
| function copyArray(source, array) { | |
|   var index = -1, | |
|       length = source.length; | |
| 
 | |
|   array || (array = Array(length)); | |
|   while (++index < length) { | |
|     array[index] = source[index]; | |
|   } | |
|   return array; | |
| } | |
| 
 | |
| module.exports = copyArray;
 |